The CFTR (Cystic Fibrosis Transmembrane Conductance Regulator) is a protein that functions as a channel for chloride ions across cell membranes. It plays a crucial role in maintaining the water and ion balance on epithelial surfaces, particularly in the lungs, pancreas, and intestines. Mutations in the CFTR gene can lead to cystic fibrosis, a genetic disorder that affects the respiratory and digestive systems.
